I attended my 1st Cactus & Succulent Society of America convention last week. It was terrific. Len Newton, Microbiology Prof at Kenyatta Univ in Kenya gave a talk on the 5 arborescent varieties of sansevierias. Prof Newton wrote the best (in my opinion) treatise on sans for Urs Eggli, the editor of "The Illustrated Handbook of Succulent Plants - Monocots" in 2004. He said he is writing a revised article for Urs in which he is moving the Sans back to Ruscaceae from the Asperagaceae. Just thought you all might like to know.